i know youre looking for manga but if you are looking for manwha's i have a small list here! (since i acidently already collected some before reading you wanted manga and it felt like a shame to not just send the list)
historical/ fantasy- esque
https://www.mangago.me/read-manga/the_moon_painting_alchemist/
https://www.mangago.me/read-manga/the_snake_that_swallowed_the_pomegranate/
https://www.mangago.me/read-manga/the_rogue_prince_is_secretly_an_omega/
https://www.mangago.me/read-manga/how_the_sidekick_prince_lives_again/
https://www.mangago.me/read-manga/see_you_my_king/
https://www.mangago.me/read-manga/winterfield/
https://www.mangago.me/read-manga/antidote_harusari/
https://www.mangago.me/read-manga/don_t_press_the_button/
pure smut historical/fantasy
https://www.mangago.me/read-manga/a_crazy_elf_gets_a_dragon/
https://www.mangago.me/read-manga/the_count_has_been_reincarnated/
https://www.mangago.me/read-manga/imoogi_and_the_woodcutter/
Omg you made a whole ducking list !! You're too kind I can't thank you enough aaaa ╥﹏╥ definitely gonna give them a read!! Thank you so muuuch <3
Good fantasy yaoi *manga* recommendations please ლ(´ڡ`ლ)